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samba-mirror/source/smb_server/smb/receive.c
Stefan Metzmacher 287fc1c22d r15734: This is a major change to the NTVFS subsystem: 
- to use a struct ntvfs_handle instead of a uint16_t fnum.
  (to make it independend from the frontend protocol)
- the allocation of handles now is provided by the frontend
  (smbsrv_*) via callbacks and not by each backend module
- this also makes sure that file handles are only passed
  to the ntvfs subsystem when the tcon and session matches,
  so modules can rely on this and need to check this.
- this allows multiple modules in the ntvfs module chain
  to allocate file handles. This can be used for virtual
  files like "\\$Extend\\$Quota:$Q:$INDEX_ALLOCATION"...
- also this will make SMB2 with 128 bit file handles possible

metze
2007-10-10 14:08:10 -05:00

664 lines
22 KiB
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/*
Unix SMB/CIFS implementation.
process incoming packets - main loop
Copyright (C) Andrew Tridgell 1992-2005
Copyright (C) James J Myers 2003 <myersjj@samba.org>
Copyright (C) Stefan Metzmacher 2004-2005
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#include "system/time.h"
#include "smbd/service_stream.h"
#include "smb_server/smb_server.h"
#include "smb_server/service_smb_proto.h"
#include "ntvfs/ntvfs.h"
/*
send an oplock break request to a client
*/
NTSTATUS smbsrv_send_oplock_break(void *p, struct ntvfs_handle *ntvfs, uint8_t level)
{
struct smbsrv_tcon *tcon = talloc_get_type(p, struct smbsrv_tcon);
struct smbsrv_request *req;
req = smbsrv_init_request(tcon->smb_conn);
NT_STATUS_HAVE_NO_MEMORY(req);
smbsrv_setup_reply(req, 8, 0);
SCVAL(req->out.hdr,HDR_COM,SMBlockingX);
SSVAL(req->out.hdr,HDR_TID,tcon->tid);
SSVAL(req->out.hdr,HDR_PID,0xFFFF);
SSVAL(req->out.hdr,HDR_UID,0);
SSVAL(req->out.hdr,HDR_MID,0xFFFF);
SCVAL(req->out.hdr,HDR_FLG,0);
SSVAL(req->out.hdr,HDR_FLG2,0);
SSVAL(req->out.vwv, VWV(0), SMB_CHAIN_NONE);
SSVAL(req->out.vwv, VWV(1), 0);
smbsrv_push_fnum(req->out.vwv, VWV(2), ntvfs);
SCVAL(req->out.vwv, VWV(3), LOCKING_ANDX_OPLOCK_RELEASE);
SCVAL(req->out.vwv, VWV(3)+1, level);
SIVAL(req->out.vwv, VWV(4), 0);
SSVAL(req->out.vwv, VWV(6), 0);
SSVAL(req->out.vwv, VWV(7), 0);
smbsrv_send_reply(req);
return NT_STATUS_OK;
}
static void switch_message(int type, struct smbsrv_request *req);
/****************************************************************************
receive a SMB request header from the wire, forming a request_context
from the result
****************************************************************************/
NTSTATUS smbsrv_recv_smb_request(void *private, DATA_BLOB blob)
{
struct smbsrv_connection *smb_conn = talloc_get_type(private, struct smbsrv_connection);
struct smbsrv_request *req;
struct timeval cur_time = timeval_current();
uint8_t command;
smb_conn->statistics.last_request_time = cur_time;
/* see if its a special NBT packet */
if (CVAL(blob.data, 0) != 0) {
req = smbsrv_init_request(smb_conn);
NT_STATUS_HAVE_NO_MEMORY(req);
ZERO_STRUCT(req->in);
req->in.buffer = talloc_steal(req, blob.data);
req->in.size = blob.length;
req->request_time = cur_time;
smbsrv_reply_special(req);
return NT_STATUS_OK;
}
if ((NBT_HDR_SIZE + MIN_SMB_SIZE) > blob.length) {
DEBUG(2,("Invalid SMB packet: length %ld\n", (long)blob.length));
smbsrv_terminate_connection(smb_conn, "Invalid SMB packet");
return NT_STATUS_OK;
}
/* Make sure this is an SMB packet */
if (IVAL(blob.data, NBT_HDR_SIZE) != SMB_MAGIC) {
DEBUG(2,("Non-SMB packet of length %ld. Terminating connection\n",
(long)blob.length));
smbsrv_terminate_connection(smb_conn, "Non-SMB packet");
return NT_STATUS_OK;
}
req = smbsrv_init_request(smb_conn);
NT_STATUS_HAVE_NO_MEMORY(req);
req->in.buffer = talloc_steal(req, blob.data);
req->in.size = blob.length;
req->request_time = cur_time;
req->chained_fnum = -1;
req->in.allocated = req->in.size;
req->in.hdr = req->in.buffer + NBT_HDR_SIZE;
req->in.vwv = req->in.hdr + HDR_VWV;
req->in.wct = CVAL(req->in.hdr, HDR_WCT);
if (req->in.vwv + VWV(req->in.wct) <= req->in.buffer + req->in.size) {
req->in.data = req->in.vwv + VWV(req->in.wct) + 2;
req->in.data_size = SVAL(req->in.vwv, VWV(req->in.wct));
/* the bcc length is only 16 bits, but some packets
(such as SMBwriteX) can be much larger than 64k. We
detect this by looking for a large non-chained NBT
packet (at least 64k bigger than what is
specified). If it is detected then the NBT size is
used instead of the bcc size */
if (req->in.data_size + 0x10000 <=
req->in.size - PTR_DIFF(req->in.data, req->in.buffer) &&
(req->in.wct < 1 || SVAL(req->in.vwv, VWV(0)) == SMB_CHAIN_NONE)) {
/* its an oversized packet! fun for all the family */
req->in.data_size = req->in.size - PTR_DIFF(req->in.data,req->in.buffer);
}
}
if (NBT_HDR_SIZE + MIN_SMB_SIZE + 2*req->in.wct > req->in.size) {
DEBUG(2,("Invalid SMB word count %d\n", req->in.wct));
smbsrv_terminate_connection(req->smb_conn, "Invalid SMB packet");
return NT_STATUS_OK;
}
if (NBT_HDR_SIZE + MIN_SMB_SIZE + 2*req->in.wct + req->in.data_size > req->in.size) {
DEBUG(2,("Invalid SMB buffer length count %d\n", req->in.data_size));
smbsrv_terminate_connection(req->smb_conn, "Invalid SMB packet");
return NT_STATUS_OK;
}
req->flags2 = SVAL(req->in.hdr, HDR_FLG2);
if (!smbsrv_signing_check_incoming(req)) {
smbsrv_send_error(req, NT_STATUS_ACCESS_DENIED);
return NT_STATUS_OK;
}
command = CVAL(req->in.hdr, HDR_COM);
switch_message(command, req);
return NT_STATUS_OK;
}
/*
These flags determine some of the permissions required to do an operation
*/
#define NEED_SESS (1<<0)
#define NEED_TCON (1<<1)
#define SIGNING_NO_REPLY (1<<2)
/*
define a list of possible SMB messages and their corresponding
functions. Any message that has a NULL function is unimplemented -
please feel free to contribute implementations!
*/
static const struct smb_message_struct
{
const char *name;
void (*fn)(struct smbsrv_request *);
int flags;
}
smb_messages[256] = {
/* 0x00 */ { "SMBmkdir", smbsrv_reply_mkdir, NEED_SESS|NEED_TCON },
/* 0x01 */ { "SMBrmdir", smbsrv_reply_rmdir, NEED_SESS|NEED_TCON },
/* 0x02 */ { "SMBopen", smbsrv_reply_open, NEED_SESS|NEED_TCON },
/* 0x03 */ { "SMBcreate", smbsrv_reply_mknew, NEED_SESS|NEED_TCON },
/* 0x04 */ { "SMBclose", smbsrv_reply_close, NEED_SESS|NEED_TCON },
/* 0x05 */ { "SMBflush", smbsrv_reply_flush, NEED_SESS|NEED_TCON },
/* 0x06 */ { "SMBunlink", smbsrv_reply_unlink, NEED_SESS|NEED_TCON },
/* 0x07 */ { "SMBmv", smbsrv_reply_mv, NEED_SESS|NEED_TCON },
/* 0x08 */ { "SMBgetatr", smbsrv_reply_getatr, NEED_SESS|NEED_TCON },
/* 0x09 */ { "SMBsetatr", smbsrv_reply_setatr, NEED_SESS|NEED_TCON },
/* 0x0a */ { "SMBread", smbsrv_reply_read, NEED_SESS|NEED_TCON },
/* 0x0b */ { "SMBwrite", smbsrv_reply_write, NEED_SESS|NEED_TCON },
/* 0x0c */ { "SMBlock", smbsrv_reply_lock, NEED_SESS|NEED_TCON },
/* 0x0d */ { "SMBunlock", smbsrv_reply_unlock, NEED_SESS|NEED_TCON },
/* 0x0e */ { "SMBctemp", smbsrv_reply_ctemp, NEED_SESS|NEED_TCON },
/* 0x0f */ { "SMBmknew", smbsrv_reply_mknew, NEED_SESS|NEED_TCON },
/* 0x10 */ { "SMBchkpth", smbsrv_reply_chkpth, NEED_SESS|NEED_TCON },
/* 0x11 */ { "SMBexit", smbsrv_reply_exit, NEED_SESS },
/* 0x12 */ { "SMBlseek", smbsrv_reply_lseek, NEED_SESS|NEED_TCON },
/* 0x13 */ { "SMBlockread", smbsrv_reply_lockread, NEED_SESS|NEED_TCON },
/* 0x14 */ { "SMBwriteunlock", smbsrv_reply_writeunlock, NEED_SESS|NEED_TCON },
/* 0x15 */ { NULL, NULL, 0 },
/* 0x16 */ { NULL, NULL, 0 },
/* 0x17 */ { NULL, NULL, 0 },
/* 0x18 */ { NULL, NULL, 0 },
/* 0x19 */ { NULL, NULL, 0 },
/* 0x1a */ { "SMBreadbraw", smbsrv_reply_readbraw, NEED_SESS|NEED_TCON },
/* 0x1b */ { "SMBreadBmpx", smbsrv_reply_readbmpx, NEED_SESS|NEED_TCON },
/* 0x1c */ { "SMBreadBs", NULL, 0 },
/* 0x1d */ { "SMBwritebraw", smbsrv_reply_writebraw, NEED_SESS|NEED_TCON },
/* 0x1e */ { "SMBwriteBmpx", smbsrv_reply_writebmpx, NEED_SESS|NEED_TCON },
/* 0x1f */ { "SMBwriteBs", smbsrv_reply_writebs, NEED_SESS|NEED_TCON },
/* 0x20 */ { "SMBwritec", NULL, 0 },
/* 0x21 */ { NULL, NULL, 0 },
/* 0x22 */ { "SMBsetattrE", smbsrv_reply_setattrE, NEED_SESS|NEED_TCON },
/* 0x23 */ { "SMBgetattrE", smbsrv_reply_getattrE, NEED_SESS|NEED_TCON },
/* 0x24 */ { "SMBlockingX", smbsrv_reply_lockingX, NEED_SESS|NEED_TCON },
/* 0x25 */ { "SMBtrans", smbsrv_reply_trans, NEED_SESS|NEED_TCON },
/* 0x26 */ { "SMBtranss", smbsrv_reply_transs, NEED_SESS|NEED_TCON },
/* 0x27 */ { "SMBioctl", smbsrv_reply_ioctl, NEED_SESS|NEED_TCON },
/* 0x28 */ { "SMBioctls", NULL, NEED_SESS|NEED_TCON },
/* 0x29 */ { "SMBcopy", smbsrv_reply_copy, NEED_SESS|NEED_TCON },
/* 0x2a */ { "SMBmove", NULL, NEED_SESS|NEED_TCON },
/* 0x2b */ { "SMBecho", smbsrv_reply_echo, 0 },
/* 0x2c */ { "SMBwriteclose", smbsrv_reply_writeclose, NEED_SESS|NEED_TCON },
/* 0x2d */ { "SMBopenX", smbsrv_reply_open_and_X, NEED_SESS|NEED_TCON },
/* 0x2e */ { "SMBreadX", smbsrv_reply_read_and_X, NEED_SESS|NEED_TCON },
/* 0x2f */ { "SMBwriteX", smbsrv_reply_write_and_X, NEED_SESS|NEED_TCON},
/* 0x30 */ { NULL, NULL, 0 },
/* 0x31 */ { NULL, NULL, 0 },
/* 0x32 */ { "SMBtrans2", smbsrv_reply_trans2, NEED_SESS|NEED_TCON },
/* 0x33 */ { "SMBtranss2", smbsrv_reply_transs2, NEED_SESS|NEED_TCON },
/* 0x34 */ { "SMBfindclose", smbsrv_reply_findclose, NEED_SESS|NEED_TCON },
/* 0x35 */ { "SMBfindnclose", smbsrv_reply_findnclose, NEED_SESS|NEED_TCON },
/* 0x36 */ { NULL, NULL, 0 },
/* 0x37 */ { NULL, NULL, 0 },
/* 0x38 */ { NULL, NULL, 0 },
/* 0x39 */ { NULL, NULL, 0 },
/* 0x3a */ { NULL, NULL, 0 },
/* 0x3b */ { NULL, NULL, 0 },
/* 0x3c */ { NULL, NULL, 0 },
/* 0x3d */ { NULL, NULL, 0 },
/* 0x3e */ { NULL, NULL, 0 },
/* 0x3f */ { NULL, NULL, 0 },
/* 0x40 */ { NULL, NULL, 0 },
/* 0x41 */ { NULL, NULL, 0 },
/* 0x42 */ { NULL, NULL, 0 },
/* 0x43 */ { NULL, NULL, 0 },
/* 0x44 */ { NULL, NULL, 0 },
/* 0x45 */ { NULL, NULL, 0 },
/* 0x46 */ { NULL, NULL, 0 },
/* 0x47 */ { NULL, NULL, 0 },
/* 0x48 */ { NULL, NULL, 0 },
/* 0x49 */ { NULL, NULL, 0 },
/* 0x4a */ { NULL, NULL, 0 },
/* 0x4b */ { NULL, NULL, 0 },
/* 0x4c */ { NULL, NULL, 0 },
/* 0x4d */ { NULL, NULL, 0 },
/* 0x4e */ { NULL, NULL, 0 },
/* 0x4f */ { NULL, NULL, 0 },
/* 0x50 */ { NULL, NULL, 0 },
/* 0x51 */ { NULL, NULL, 0 },
/* 0x52 */ { NULL, NULL, 0 },
/* 0x53 */ { NULL, NULL, 0 },
/* 0x54 */ { NULL, NULL, 0 },
/* 0x55 */ { NULL, NULL, 0 },
/* 0x56 */ { NULL, NULL, 0 },
/* 0x57 */ { NULL, NULL, 0 },
/* 0x58 */ { NULL, NULL, 0 },
/* 0x59 */ { NULL, NULL, 0 },
/* 0x5a */ { NULL, NULL, 0 },
/* 0x5b */ { NULL, NULL, 0 },
/* 0x5c */ { NULL, NULL, 0 },
/* 0x5d */ { NULL, NULL, 0 },
/* 0x5e */ { NULL, NULL, 0 },
/* 0x5f */ { NULL, NULL, 0 },
/* 0x60 */ { NULL, NULL, 0 },
/* 0x61 */ { NULL, NULL, 0 },
/* 0x62 */ { NULL, NULL, 0 },
/* 0x63 */ { NULL, NULL, 0 },
/* 0x64 */ { NULL, NULL, 0 },
/* 0x65 */ { NULL, NULL, 0 },
/* 0x66 */ { NULL, NULL, 0 },
/* 0x67 */ { NULL, NULL, 0 },
/* 0x68 */ { NULL, NULL, 0 },
/* 0x69 */ { NULL, NULL, 0 },
/* 0x6a */ { NULL, NULL, 0 },
/* 0x6b */ { NULL, NULL, 0 },
/* 0x6c */ { NULL, NULL, 0 },
/* 0x6d */ { NULL, NULL, 0 },
/* 0x6e */ { NULL, NULL, 0 },
/* 0x6f */ { NULL, NULL, 0 },
/* 0x70 */ { "SMBtcon", smbsrv_reply_tcon, NEED_SESS },
/* 0x71 */ { "SMBtdis", smbsrv_reply_tdis, NEED_TCON },
/* 0x72 */ { "SMBnegprot", smbsrv_reply_negprot, 0 },
/* 0x73 */ { "SMBsesssetupX", smbsrv_reply_sesssetup, 0 },
/* 0x74 */ { "SMBulogoffX", smbsrv_reply_ulogoffX, NEED_SESS }, /* ulogoff doesn't give a valid TID */
/* 0x75 */ { "SMBtconX", smbsrv_reply_tcon_and_X, NEED_SESS },
/* 0x76 */ { NULL, NULL, 0 },
/* 0x77 */ { NULL, NULL, 0 },
/* 0x78 */ { NULL, NULL, 0 },
/* 0x79 */ { NULL, NULL, 0 },
/* 0x7a */ { NULL, NULL, 0 },
/* 0x7b */ { NULL, NULL, 0 },
/* 0x7c */ { NULL, NULL, 0 },
/* 0x7d */ { NULL, NULL, 0 },
/* 0x7e */ { NULL, NULL, 0 },
/* 0x7f */ { NULL, NULL, 0 },
/* 0x80 */ { "SMBdskattr", smbsrv_reply_dskattr, NEED_SESS|NEED_TCON },
/* 0x81 */ { "SMBsearch", smbsrv_reply_search, NEED_SESS|NEED_TCON },
/* 0x82 */ { "SMBffirst", smbsrv_reply_search, NEED_SESS|NEED_TCON },
/* 0x83 */ { "SMBfunique", smbsrv_reply_search, NEED_SESS|NEED_TCON },
/* 0x84 */ { "SMBfclose", smbsrv_reply_fclose, NEED_SESS|NEED_TCON },
/* 0x85 */ { NULL, NULL, 0 },
/* 0x86 */ { NULL, NULL, 0 },
/* 0x87 */ { NULL, NULL, 0 },
/* 0x88 */ { NULL, NULL, 0 },
/* 0x89 */ { NULL, NULL, 0 },
/* 0x8a */ { NULL, NULL, 0 },
/* 0x8b */ { NULL, NULL, 0 },
/* 0x8c */ { NULL, NULL, 0 },
/* 0x8d */ { NULL, NULL, 0 },
/* 0x8e */ { NULL, NULL, 0 },
/* 0x8f */ { NULL, NULL, 0 },
/* 0x90 */ { NULL, NULL, 0 },
/* 0x91 */ { NULL, NULL, 0 },
/* 0x92 */ { NULL, NULL, 0 },
/* 0x93 */ { NULL, NULL, 0 },
/* 0x94 */ { NULL, NULL, 0 },
/* 0x95 */ { NULL, NULL, 0 },
/* 0x96 */ { NULL, NULL, 0 },
/* 0x97 */ { NULL, NULL, 0 },
/* 0x98 */ { NULL, NULL, 0 },
/* 0x99 */ { NULL, NULL, 0 },
/* 0x9a */ { NULL, NULL, 0 },
/* 0x9b */ { NULL, NULL, 0 },
/* 0x9c */ { NULL, NULL, 0 },
/* 0x9d */ { NULL, NULL, 0 },
/* 0x9e */ { NULL, NULL, 0 },
/* 0x9f */ { NULL, NULL, 0 },
/* 0xa0 */ { "SMBnttrans", smbsrv_reply_nttrans, NEED_SESS|NEED_TCON },
/* 0xa1 */ { "SMBnttranss", smbsrv_reply_nttranss, NEED_SESS|NEED_TCON },
/* 0xa2 */ { "SMBntcreateX", smbsrv_reply_ntcreate_and_X, NEED_SESS|NEED_TCON },
/* 0xa3 */ { NULL, NULL, 0 },
/* 0xa4 */ { "SMBntcancel", smbsrv_reply_ntcancel, NEED_SESS|NEED_TCON|SIGNING_NO_REPLY },
/* 0xa5 */ { "SMBntrename", smbsrv_reply_ntrename, NEED_SESS|NEED_TCON },
/* 0xa6 */ { NULL, NULL, 0 },
/* 0xa7 */ { NULL, NULL, 0 },
/* 0xa8 */ { NULL, NULL, 0 },
/* 0xa9 */ { NULL, NULL, 0 },
/* 0xaa */ { NULL, NULL, 0 },
/* 0xab */ { NULL, NULL, 0 },
/* 0xac */ { NULL, NULL, 0 },
/* 0xad */ { NULL, NULL, 0 },
/* 0xae */ { NULL, NULL, 0 },
/* 0xaf */ { NULL, NULL, 0 },
/* 0xb0 */ { NULL, NULL, 0 },
/* 0xb1 */ { NULL, NULL, 0 },
/* 0xb2 */ { NULL, NULL, 0 },
/* 0xb3 */ { NULL, NULL, 0 },
/* 0xb4 */ { NULL, NULL, 0 },
/* 0xb5 */ { NULL, NULL, 0 },
/* 0xb6 */ { NULL, NULL, 0 },
/* 0xb7 */ { NULL, NULL, 0 },
/* 0xb8 */ { NULL, NULL, 0 },
/* 0xb9 */ { NULL, NULL, 0 },
/* 0xba */ { NULL, NULL, 0 },
/* 0xbb */ { NULL, NULL, 0 },
/* 0xbc */ { NULL, NULL, 0 },
/* 0xbd */ { NULL, NULL, 0 },
/* 0xbe */ { NULL, NULL, 0 },
/* 0xbf */ { NULL, NULL, 0 },
/* 0xc0 */ { "SMBsplopen", smbsrv_reply_printopen, NEED_SESS|NEED_TCON },
/* 0xc1 */ { "SMBsplwr", smbsrv_reply_printwrite, NEED_SESS|NEED_TCON },
/* 0xc2 */ { "SMBsplclose", smbsrv_reply_printclose, NEED_SESS|NEED_TCON },
/* 0xc3 */ { "SMBsplretq", smbsrv_reply_printqueue, NEED_SESS|NEED_TCON },
/* 0xc4 */ { NULL, NULL, 0 },
/* 0xc5 */ { NULL, NULL, 0 },
/* 0xc6 */ { NULL, NULL, 0 },
/* 0xc7 */ { NULL, NULL, 0 },
/* 0xc8 */ { NULL, NULL, 0 },
/* 0xc9 */ { NULL, NULL, 0 },
/* 0xca */ { NULL, NULL, 0 },
/* 0xcb */ { NULL, NULL, 0 },
/* 0xcc */ { NULL, NULL, 0 },
/* 0xcd */ { NULL, NULL, 0 },
/* 0xce */ { NULL, NULL, 0 },
/* 0xcf */ { NULL, NULL, 0 },
/* 0xd0 */ { "SMBsends", NULL, 0 },
/* 0xd1 */ { "SMBsendb", NULL, 0 },
/* 0xd2 */ { "SMBfwdname", NULL, 0 },
/* 0xd3 */ { "SMBcancelf", NULL, 0 },
/* 0xd4 */ { "SMBgetmac", NULL, 0 },
/* 0xd5 */ { "SMBsendstrt", NULL, 0 },
/* 0xd6 */ { "SMBsendend", NULL, 0 },
/* 0xd7 */ { "SMBsendtxt", NULL, 0 },
/* 0xd8 */ { NULL, NULL, 0 },
/* 0xd9 */ { NULL, NULL, 0 },
/* 0xda */ { NULL, NULL, 0 },
/* 0xdb */ { NULL, NULL, 0 },
/* 0xdc */ { NULL, NULL, 0 },
/* 0xdd */ { NULL, NULL, 0 },
/* 0xde */ { NULL, NULL, 0 },
/* 0xdf */ { NULL, NULL, 0 },
/* 0xe0 */ { NULL, NULL, 0 },
/* 0xe1 */ { NULL, NULL, 0 },
/* 0xe2 */ { NULL, NULL, 0 },
/* 0xe3 */ { NULL, NULL, 0 },
/* 0xe4 */ { NULL, NULL, 0 },
/* 0xe5 */ { NULL, NULL, 0 },
/* 0xe6 */ { NULL, NULL, 0 },
/* 0xe7 */ { NULL, NULL, 0 },
/* 0xe8 */ { NULL, NULL, 0 },
/* 0xe9 */ { NULL, NULL, 0 },
/* 0xea */ { NULL, NULL, 0 },
/* 0xeb */ { NULL, NULL, 0 },
/* 0xec */ { NULL, NULL, 0 },
/* 0xed */ { NULL, NULL, 0 },
/* 0xee */ { NULL, NULL, 0 },
/* 0xef */ { NULL, NULL, 0 },
/* 0xf0 */ { NULL, NULL, 0 },
/* 0xf1 */ { NULL, NULL, 0 },
/* 0xf2 */ { NULL, NULL, 0 },
/* 0xf3 */ { NULL, NULL, 0 },
/* 0xf4 */ { NULL, NULL, 0 },
/* 0xf5 */ { NULL, NULL, 0 },
/* 0xf6 */ { NULL, NULL, 0 },
/* 0xf7 */ { NULL, NULL, 0 },
/* 0xf8 */ { NULL, NULL, 0 },
/* 0xf9 */ { NULL, NULL, 0 },
/* 0xfa */ { NULL, NULL, 0 },
/* 0xfb */ { NULL, NULL, 0 },
/* 0xfc */ { NULL, NULL, 0 },
/* 0xfd */ { NULL, NULL, 0 },
/* 0xfe */ { NULL, NULL, 0 },
/* 0xff */ { NULL, NULL, 0 }
};
/****************************************************************************
return a string containing the function name of a SMB command
****************************************************************************/
static const char *smb_fn_name(uint8_t type)
{
const char *unknown_name = "SMBunknown";
if (smb_messages[type].name == NULL)
return unknown_name;
return smb_messages[type].name;
}
/****************************************************************************
Do a switch on the message type and call the specific reply function for this
message. Unlike earlier versions of Samba the reply functions are responsible
for sending the reply themselves, rather than returning a size to this function
The reply functions may also choose to delay the processing by pushing the message
onto the message queue
****************************************************************************/
static void switch_message(int type, struct smbsrv_request *req)
{
int flags;
struct smbsrv_connection *smb_conn = req->smb_conn;
NTSTATUS status;
type &= 0xff;
errno = 0;
if (smb_messages[type].fn == NULL) {
DEBUG(0,("Unknown message type %d!\n",type));
smbsrv_reply_unknown(req);
return;
}
flags = smb_messages[type].flags;
req->tcon = smbsrv_smb_tcon_find(smb_conn, SVAL(req->in.hdr,HDR_TID), req->request_time);
if (!req->session) {
/* setup the user context for this request if it
hasn't already been initialised (to cope with SMB
chaining) */
/* In share mode security we must ignore the vuid. */
if (smb_conn->config.security == SEC_SHARE) {
if (req->tcon) {
req->session = req->tcon->sec_share.session;
}
} else {
req->session = smbsrv_session_find(req->smb_conn, SVAL(req->in.hdr,HDR_UID), req->request_time);
}
}
DEBUG(5,("switch message %s (task_id %d)\n",smb_fn_name(type), req->smb_conn->connection->server_id));
/* this must be called before we do any reply */
if (flags & SIGNING_NO_REPLY) {
smbsrv_signing_no_reply(req);
}
/* see if the vuid is valid */
if ((flags & NEED_SESS) && !req->session) {
/* amazingly, the error code depends on the command */
switch (type) {
case SMBntcreateX:
case SMBntcancel:
case SMBulogoffX:
status = NT_STATUS_DOS(ERRSRV, ERRbaduid);
break;
default:
status = NT_STATUS_INVALID_HANDLE;
break;
}
/*
* TODO:
* don't know how to handle smb signing for this case
* so just skip the reply
*/
if ((flags & SIGNING_NO_REPLY) &&
(req->smb_conn->signing.signing_state != SMB_SIGNING_ENGINE_OFF)) {
DEBUG(1,("SKIP ERROR REPLY: %s %s because of unknown smb signing case\n",
smb_fn_name(type), nt_errstr(status)));
talloc_free(req);
return;
}
smbsrv_send_error(req, status);
return;
}
/* does this protocol need a valid tree connection? */
if ((flags & NEED_TCON) && !req->tcon) {
/* amazingly, the error code depends on the command */
switch (type) {
case SMBntcreateX:
case SMBntcancel:
case SMBtdis:
status = NT_STATUS_DOS(ERRSRV, ERRinvnid);
break;
default:
status = NT_STATUS_INVALID_HANDLE;
break;
}
/*
* TODO:
* don't know how to handle smb signing for this case
* so just skip the reply
*/
if ((flags & SIGNING_NO_REPLY) &&
(req->smb_conn->signing.signing_state != SMB_SIGNING_ENGINE_OFF)) {
DEBUG(1,("SKIP ERROR REPLY: %s %s because of unknown smb signing case\n",
smb_fn_name(type), nt_errstr(status)));
talloc_free(req);
return;
}
smbsrv_send_error(req, status);
return;
}
smb_messages[type].fn(req);
}
/*
we call this when first first part of a possibly chained request has been completed
and we need to call the 2nd part, if any
*/
void smbsrv_chain_reply(struct smbsrv_request *req)
{
uint16_t chain_cmd, chain_offset;
uint8_t *vwv, *data;
uint16_t wct;
uint16_t data_size;
if (req->in.wct < 2 || req->out.wct < 2) {
smbsrv_send_error(req, NT_STATUS_DOS(ERRSRV, ERRerror));
return;
}
chain_cmd = CVAL(req->in.vwv, VWV(0));
chain_offset = SVAL(req->in.vwv, VWV(1));
if (chain_cmd == SMB_CHAIN_NONE) {
/* end of chain */
SSVAL(req->out.vwv, VWV(0), SMB_CHAIN_NONE);
SSVAL(req->out.vwv, VWV(1), 0);
smbsrv_send_reply(req);
return;
}
if (chain_offset + req->in.hdr >= req->in.buffer + req->in.size) {
goto error;
}
wct = CVAL(req->in.hdr, chain_offset);
vwv = req->in.hdr + chain_offset + 1;
if (vwv + VWV(wct) + 2 > req->in.buffer + req->in.size) {
goto error;
}
data_size = SVAL(vwv, VWV(wct));
data = vwv + VWV(wct) + 2;
if (data + data_size > req->in.buffer + req->in.size) {
goto error;
}
/* all seems legit */
req->in.vwv = vwv;
req->in.wct = wct;
req->in.data = data;
req->in.data_size = data_size;
req->in.ptr = data;
req->chain_count++;
SSVAL(req->out.vwv, VWV(0), chain_cmd);
SSVAL(req->out.vwv, VWV(1), req->out.size - NBT_HDR_SIZE);
/* cleanup somestuff for the next request */
talloc_free(req->ntvfs);
req->ntvfs = NULL;
talloc_free(req->io_ptr);
req->io_ptr = NULL;
switch_message(chain_cmd, req);
return;
error:
SSVAL(req->out.vwv, VWV(0), SMB_CHAIN_NONE);
SSVAL(req->out.vwv, VWV(1), 0);
smbsrv_send_error(req, NT_STATUS_DOS(ERRSRV, ERRerror));
}
/*
* init the SMB protocol related stuff
*/
NTSTATUS smbsrv_init_smb_connection(struct smbsrv_connection *smb_conn)
{
NTSTATUS status;
/* now initialise a few default values associated with this smb socket */
smb_conn->negotiate.max_send = 0xFFFF;
/* this is the size that w2k uses, and it appears to be important for
good performance */
smb_conn->negotiate.max_recv = lp_max_xmit();
smb_conn->negotiate.zone_offset = get_time_zone(time(NULL));
smb_conn->config.security = lp_security();
smb_conn->config.nt_status_support = lp_nt_status_support();
status = smbsrv_init_sessions(smb_conn, UINT16_MAX);
NT_STATUS_NOT_OK_RETURN(status);
status = smbsrv_smb_init_tcons(smb_conn);
NT_STATUS_NOT_OK_RETURN(status);
smbsrv_init_signing(smb_conn);
return NT_STATUS_OK;
}
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